/ Dictionary / Index B brush border: Meaning and Definition of Find definitions for: brush' bor"der Pronunciation: [key] — Anat. Anat. a dense array of microvilli projecting from the surface of certain epithelial tissues, as the lining of the intestinal tract. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. brushback brush broom Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language